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36 Micro Motion
®
Model 1700 and 2700 Transmitters
Output Wiring – Model 1700/2700 Intrinsically Safe Transmitters
Figure 5-4 Safe area HART multidrop wiring with SMART FAMILY
™
transmitters and a configuration tool
5.3.2 Safe area frequency/discrete output wiring
The following frequency/discrete output wiring diagram is an example of proper basic wiring for the
Model 1700 transmitter’s frequency output or the Model 2700 transmitter’s frequency/discrete output.
Figure 5-5 Safe area frequency/discrete output wiring
HART-compatible
host or controller
HART-compatible
transmitters
SMART FAMILY
™
transmitter
Note: For optimum HART communication, make sure the output loop
is single-point-grounded to an instrument-grade ground.
24 VDC loop power
supply required for
HART 4–20 mA
passive transmitters
600 Ω maximum resistance
250 Ω minimum resistance
Model 1700 or 2700
I.S. transmitter
+
–
Note: See Figure 5-6 for voltage and resistance values.
Counter
VDC
R
load
+
–
+
–
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